tree-wide: switch to using mod.rs

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

src/config/mod.rs

@@ -0,0 +1,212 @@
+//! Proxmox Backup Server Configuration library
+//!
+//! This library contains helper to read, parse and write the
+//! configuration files.
+
+use anyhow::{bail, format_err, Error};
+use std::path::PathBuf;
+use nix::sys::stat::Mode;
+use openssl::rsa::{Rsa};
+use openssl::x509::{X509Builder};
+use openssl::pkey::PKey;
+
+use proxmox::tools::fs::{CreateOptions, replace_file};
+use proxmox::try_block;
+
+use pbs_buildcfg::{self, configdir};
+
+pub mod acl;
+pub mod acme;
+pub mod cached_user_info;
+pub mod datastore;
+pub mod network;
+pub mod node;
+pub mod remote;
+pub mod sync;
+pub mod tfa;
+pub mod token_shadow;
+pub mod user;
+pub mod verify;
+pub mod drive;
+pub mod media_pool;
+pub mod tape_encryption_keys;
+pub mod tape_job;
+pub mod domains;
+
+/// Check configuration directory permissions
+///
+/// For security reasons, we want to make sure they are set correctly:
+/// * owned by 'backup' user/group
+/// * nobody else can read (mode 0700)
+pub fn check_configdir_permissions() -> Result<(), Error> {
+    let cfgdir = pbs_buildcfg::CONFIGDIR;
+
+    let backup_user = crate::backup::backup_user()?;
+    let backup_uid = backup_user.uid.as_raw();
+    let backup_gid = backup_user.gid.as_raw();
+
+    try_block!({
+        let stat = nix::sys::stat::stat(cfgdir)?;
+
+        if stat.st_uid != backup_uid {
+            bail!("wrong user ({} != {})", stat.st_uid, backup_uid);
+        }
+        if stat.st_gid != backup_gid {
+            bail!("wrong group ({} != {})", stat.st_gid, backup_gid);
+        }
+
+        let perm = stat.st_mode & 0o777;
+        if perm != 0o700 {
+            bail!("wrong permission ({:o} != {:o})", perm, 0o700);
+        }
+        Ok(())
+    })
+    .map_err(|err| {
+        format_err!(
+            "configuration directory '{}' permission problem - {}",
+            cfgdir,
+            err
+        )
+    })
+}
+
+pub fn create_configdir() -> Result<(), Error> {
+    let cfgdir = pbs_buildcfg::CONFIGDIR;
+
+    match nix::unistd::mkdir(cfgdir, Mode::from_bits_truncate(0o700)) {
+        Ok(()) => {}
+        Err(nix::Error::Sys(nix::errno::Errno::EEXIST)) => {
+            check_configdir_permissions()?;
+            return Ok(());
+        }
+        Err(err) => bail!(
+            "unable to create configuration directory '{}' - {}",
+            cfgdir,
+            err
+        ),
+    }
+
+    let backup_user = crate::backup::backup_user()?;
+
+    nix::unistd::chown(cfgdir, Some(backup_user.uid), Some(backup_user.gid))
+        .map_err(|err| {
+            format_err!(
+                "unable to set configuration directory '{}' permissions - {}",
+                cfgdir,
+                err
+            )
+        })
+}
+
+/// Update self signed node certificate.
+pub fn update_self_signed_cert(force: bool) -> Result<(), Error> {
+
+    let key_path = PathBuf::from(configdir!("/proxy.key"));
+    let cert_path = PathBuf::from(configdir!("/proxy.pem"));
+
+    if key_path.exists() && cert_path.exists() && !force { return Ok(()); }
+
+    let rsa = Rsa::generate(4096).unwrap();
+
+    let priv_pem = rsa.private_key_to_pem()?;
+
+    let mut x509 = X509Builder::new()?;
+
+    x509.set_version(2)?;
+
+    let today = openssl::asn1::Asn1Time::days_from_now(0)?;
+    x509.set_not_before(&today)?;
+    let expire = openssl::asn1::Asn1Time::days_from_now(365*1000)?;
+    x509.set_not_after(&expire)?;
+
+    let nodename = proxmox::tools::nodename();
+    let mut fqdn = nodename.to_owned();
+
+    let resolv_conf = crate::api2::node::dns::read_etc_resolv_conf()?;
+    if let Some(search) = resolv_conf["search"].as_str() {
+        fqdn.push('.');
+        fqdn.push_str(search);
+    }
+
+    // we try to generate an unique 'subject' to avoid browser problems
+    //(reused serial numbers, ..)
+    let uuid = proxmox::tools::uuid::Uuid::generate();
+
+    let mut subject_name = openssl::x509::X509NameBuilder::new()?;
+    subject_name.append_entry_by_text("O", "Proxmox Backup Server")?;
+    subject_name.append_entry_by_text("OU", &format!("{:X}", uuid))?;
+    subject_name.append_entry_by_text("CN", &fqdn)?;
+    let subject_name = subject_name.build();
+
+    x509.set_subject_name(&subject_name)?;
+    x509.set_issuer_name(&subject_name)?;
+
+    let bc = openssl::x509::extension::BasicConstraints::new(); // CA = false
+    let bc = bc.build()?;
+    x509.append_extension(bc)?;
+
+    let usage = openssl::x509::extension::ExtendedKeyUsage::new()
+        .server_auth()
+        .build()?;
+    x509.append_extension(usage)?;
+
+    let context = x509.x509v3_context(None, None);
+
+    let mut alt_names = openssl::x509::extension::SubjectAlternativeName::new();
+
+    alt_names.ip("127.0.0.1");
+    alt_names.ip("::1");
+
+    alt_names.dns("localhost");
+
+    if nodename != "localhost" { alt_names.dns(nodename); }
+    if nodename != fqdn { alt_names.dns(&fqdn); }
+
+    let alt_names = alt_names.build(&context)?;
+
+    x509.append_extension(alt_names)?;
+
+    let pub_pem = rsa.public_key_to_pem()?;
+    let pubkey = PKey::public_key_from_pem(&pub_pem)?;
+
+    x509.set_pubkey(&pubkey)?;
+
+    let context = x509.x509v3_context(None, None);
+    let ext = openssl::x509::extension::SubjectKeyIdentifier::new().build(&context)?;
+    x509.append_extension(ext)?;
+
+    let context = x509.x509v3_context(None, None);
+    let ext = openssl::x509::extension::AuthorityKeyIdentifier::new()
+        .keyid(true)
+        .build(&context)?;
+    x509.append_extension(ext)?;
+
+    let privkey = PKey::from_rsa(rsa)?;
+
+    x509.sign(&privkey, openssl::hash::MessageDigest::sha256())?;
+
+    let x509 = x509.build();
+    let cert_pem = x509.to_pem()?;
+
+    set_proxy_certificate(&cert_pem, &priv_pem)?;
+
+    Ok(())
+}
+
+pub(crate) fn set_proxy_certificate(cert_pem: &[u8], key_pem: &[u8]) -> Result<(), Error> {
+    let backup_user = crate::backup::backup_user()?;
+    let options = CreateOptions::new()
+        .perm(Mode::from_bits_truncate(0o0640))
+        .owner(nix::unistd::ROOT)
+        .group(backup_user.gid);
+    let key_path = PathBuf::from(configdir!("/proxy.key"));
+    let cert_path = PathBuf::from(configdir!("/proxy.pem"));
+
+    create_configdir()?;
+    replace_file(&key_path, &key_pem, options.clone())
+        .map_err(|err| format_err!("error writing certificate private key - {}", err))?;
+    replace_file(&cert_path, &cert_pem, options)
+        .map_err(|err| format_err!("error writing certificate file - {}", err))?;
+
+    Ok(())
+}